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  1. when i want epoxy to stick to cast iron i rough...

    when i want epoxy to stick to cast iron i rough it up with 50 grit sand paper so it has something rough enough to grab
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    pickling or acid treatment may be roughing the surface too
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    . only thing to add is i use a .001 or .002"...

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    only thing to add is i use a .001 or .002" smaller pin in a hand tightened collet so if hole not aligned it just pushes pin into collet. normally to get pin close and handle mode adjust you can...
  3. its my belief those pan types are never really...

    its my belief those pan types are never really fully cleaned. that is you leave some fat and oil thats charred on the surface, and after a few dozen times of use its seasoned. if a few spots flake...
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    i have scanned negatives before (with a slide...

    i have scanned negatives before (with a slide light box to shine light through it) but dont expect miracles. my old company had all microfilm drawings scanned to tiff files.
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    bulk scanning by the...
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    horizontal cnc's that share 24 pallets (44"square...

    horizontal cnc's that share 24 pallets (44"square tables) that a robot is used to put in racks with parts (parts often weigh over 1/2 ton) in fixtures on pallets or load pallet on to cnc or bring to...
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    a slide light box if placed over negative will...

    a slide light box if placed over negative will shine light through it for scanning.
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    typical film resolution. if you take average 35mm camera with average high quality lenses and tried to...
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    i have seen triple sealed ball bearings before,...

    i have seen triple sealed ball bearings before, used to call them farm or manure bearings, hard to turn but triple seals helps keep the dirt from getting in on tractors and stuff. got to make sure...
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    . the parameter where rapid stops and feed...

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    the parameter where rapid stops and feed begins when pecking back into hole is important. if peck drilling with a spade drill or any drill type and if hearing crunching sound when it rapids back...
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    . long parabolic drills are famous for vibration...

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    long parabolic drills are famous for vibration resonance issues. that is rpm often has nothing to due with a cutting edge heat limit. often have seen where vibration was ignored cause feed and...
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    load of application has a effect. that is when...

    load of application has a effect. that is when soft materials are used for bearings under high load they tend to distort, flow or wear out extremely fast. often dont last even a week if psi or load...
  11. had a mazak rotary union go. it sounded like a...

    had a mazak rotary union go. it sounded like a machine gun as the ball bearings went out of it. then coolant was leaking around tool changer arm and got on encoder so tool changer arm went out of...
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    . if some chips still in hole and if peck into...

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    if some chips still in hole and if peck into hole goes too close to hole bottom when you rapid 100% the chips get pushed to hole bottom compressed hard and its like drill hit part with a hammer....
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    many parts are lapped with a thin lapping...

    many parts are lapped with a thin lapping compound and rotated and moved back and forth lengthwise then they are cleaned of lapping compound. glass lenses are called ground but its a type of lapping...
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    usually a probe will repeat within .0002"...

    usually a probe will repeat within .0002" assuming it doesnt have sticky residue on probe tip or there is no dirt on the part measured. or there is no sticky residue in the probe. i have seen probes...
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    basis math lets say per 100 parts at 3 minutes...

    basis math lets say per 100 parts at 3 minutes each not pecking and 6 minutes pecking
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    660 minutes actual total per 100 parts, 300 minutes + 360 minutes rework (2% of parts break drills) plus a...
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    broke a .166 drill today, only going about 1.1"...

    broke a .166 drill today, only going about 1.1" deep, still no peck and it broke about 1" deep into the 1st hole. took about 3 hours to drill it out and replace drill and rerun and replace tap that...
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    . obviously you use what works best. ....

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    obviously you use what works best.
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    pecking is not fool proof. it does have certain factors that need to be aware off. for example pecking and rapids are so fast the coolant does not have...
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    gear making machine manufacturers have ways to...

    gear making machine manufacturers have ways to design, machine, hone, grind, lap and test gears extremely fast. the technology is fairly complex and many manufacturers have training classes. and many...
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    i peck often even with spade drills (easily over...

    i peck often even with spade drills (easily over 1000 spade drilled holes) and other drills that some say never to peck with
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    obviously and maybe needs to be emphasized a billion times you usually...
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    sometimes a special round plate with shoulder...

    sometimes a special round plate with shoulder sits tightly in the large bore and this plate has a center hole that a shaft also with a shoulder goes into. the shaft sticks up centered on the locating...
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    . many coolant salesman will take coolant...

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    many coolant salesman will take coolant samples and analyze it and tell you whats wrong with it. when you got a 2000 gallon central coolant system connected to 4 machines, monthly testing of...
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    . programmer says peck drilling is bad based on...

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    programmer says peck drilling is bad based on what drill bit salesman says and what drill bit catalogs say.
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    but that does not agree with data from last 100,000 holes drilled. sure when...
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    peck drilling good or bad ?

    so had a job the other day running program as programmed.
    1) drill bit new used less than 20 minutes
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    2) 10" deep horizontally drilled .375" dia hole, feeds and speeds in normal range with...
  24. . as any instrument focused on infinity you...

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    as any instrument focused on infinity you usually deal with width of reticle for example 10 arc second wide or 5 arc second wide reticle with 1 arc second being .0006" per 10 feet.
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    so if...
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    i have had probes get dirty with coolant and get...

    i have had probes get dirty with coolant and get sticky both at tip and inside the probe mechanism. usually i tell maintenance and the replace the probe head with a spare and the sticking one gets...
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